Trouble getting new router to function

Have new equipment, trying to set it all up and get on internet.  ( Right now using hotspot).     Comcast website tried to help with router and got the message, " We're having trouble updating your settings.    Click below and someone will call you. "   Problem is I don't have a useable/functional phone at the moment.    Did call tech support, nice lady did her best to help but then we were cut off, and, she couldn't call me back since I have no phone, at the moment.  Using Gmail for phone.    ( One is coming next week from Comcast thank-gawd!)  

Using HP Chromebook 

Will call tech support back but thought I'd see if anyone has any suggestions on how to fix this.   

Thanks!